Unidentified items: weapons, armor, scrolls, and other objects. Identifying them may require a scroll of identification (and its variations) or acquire the services from a storekeeper.

The ability to throw any object (including non-weapons) and damage enemies with them.

These features are not necessarily required to be included in the game, but at least two or more of them should be present.

A bordering case that is hotly disputed in the Roguelike community is Diablo, a game inspired by Roguelikes, which added real-time game-play and isometric graphics. These games should not be added here as it only has one of these additional features (single character play); also perma-death is not implemented by default (optionally added as Hardcore mode in Diablo II).